SeedSigner+ is a complete, build-it-yourself air-gapped Bitcoin signing device kit with a larger 2.8-inch IPS display, improved QR camera, enhanced physical controls, and a durable anodized metal enclosure. It keeps the open-source SeedSigner model that matters: your Bitcoin keys stay offline, transaction data moves by QR code, and sensitive seed material disappears from working memory when the device powers down.
CryptoCloaks sells the complete kit only
Every $160 option includes the metal case and the hardware needed to build the device. We do not sell a case-only option or a partially populated case-and-screen package on this listing. Choose Black, Red, Orange, or Gold—the price is the same.
Assembly is required. Building it yourself lets you inspect the parts and understand what is inside your Bitcoin signing device.
What is included with SeedSigner+?
Metal enclosure
A two-piece anodized metal case with matching faceplate and physical buttons in Black, Red, Orange, or Gold.
2.8-inch IPS display
The larger display/control PCB and hat provide more viewing area for transaction review and QR presentation.
Controller hardware
The Pi hardware needed for the SeedSigner architecture is included in the complete kit.
Camera and SD extension
An improved QR camera, ribbon/extension hardware, and the SD-extension components shown in the kit photos.
Why SeedSigner+?
SeedSigner was created to make verifiably air-gapped Bitcoin signing accessible with open-source software and publicly available hardware. SeedSigner+ keeps that security model and improves the parts you interact with every time you sign.
- Larger 2.8-inch IPS screen: more room to inspect transaction details and display animated QR codes.
- Improved camera: quicker, more dependable scanning of animated transaction QR codes.
- Better controls: dedicated physical buttons and improved ergonomics make navigation easier.
- Metal case: a rigid, premium enclosure protects the internal boards while keeping the device compact.
- Same air-gapped model: wallet data enters and leaves through visible QR codes—not WiFi, Bluetooth, or a USB data connection to your wallet app.
- Same stateless model: the device does not need to retain your seed phrase after you power it off.
How air-gapped QR signing works
- Create or recover a seed for the session. SeedSigner supports SeedQR entry and trust-minimized entropy workflows such as dice rolls or image entropy.
- Build the unsigned transaction in compatible wallet software. Your computer or phone displays the transaction as animated QR codes.
- Scan with SeedSigner+. The built-in camera reads the QR sequence without networking the signing device.
- Review on the SeedSigner+ display. Confirm outputs, amounts, and transaction details on the signing device itself.
- Sign offline. SeedSigner+ uses the session’s private key material to create the cryptographic signature.
- Return the signed transaction by QR. Your wallet software scans the signed QR sequence and broadcasts from the online device.
- Power down. Stateless operation clears the seed from working memory; your durable backup remains your responsibility.
Important: Air-gapped does not eliminate the need for careful verification. Download SeedSigner software from the official project, verify releases when possible, inspect addresses and amounts on the SeedSigner+ screen, and maintain a separate durable backup of your seed phrase.
SeedSigner vs. SeedSigner+
Security model
Traditional: Air-gapped, stateless QR signing
SeedSigner+: The same air-gapped, stateless QR-signing model
Display
Traditional: Typical compact DIY display
SeedSigner+: Larger 2.8-inch IPS display
Camera
Traditional: Standard compatible camera
SeedSigner+: Improved QR camera
Controls
Traditional: Basic joystick/button interface
SeedSigner+: Dedicated enhanced controls
Enclosure
Traditional: Often 3D printed
SeedSigner+: Anodized metal case
CryptoCloaks package
Traditional: Parts sourced individually
SeedSigner+: Complete hardware kit for $160
Choose your SeedSigner+ color
Color changes the anodized metal enclosure only. Every option includes the same complete hardware package and costs $160.
Low-key graphite/black finish
Saturated red anodized finish
Bitcoin-orange anodized finish
Warm gold anodized finish
Open-source Bitcoin signing features
SeedSigner software supports the core workflows serious Bitcoin self-custody users expect:
- BIP39 12- and 24-word seed workflows
- Dice-roll and image-based entropy generation
- SeedQR creation and scanning
- Animated QR transaction parsing and signing
- XPUB export by QR code
- Native SegWit single-signature and multisignature workflows
- BIP85 child seed derivation
- User-configurable QR density and brightness
- Compatibility with established Bitcoin wallet coordinators such as Sparrow Wallet, Specter Desktop, Nunchuk, BlueWallet, Keeper, and Bull Bitcoin where currently supported
Wallet compatibility and SeedSigner software features can change by release. Check current official SeedSigner documentation before relying on a specific coordinator or advanced feature.
Assembly and first-use checklist
- Inventory the case, display/control board, Pi, camera, ribbon/extension parts, and included fasteners.
- Follow the SeedSigner+ assembly order carefully and avoid forcing ribbon cables or board connectors.
- Obtain the latest official SeedSigner release from the SeedSigner project.
- Verify the download using the project’s published verification instructions whenever possible.
- Write the image to the appropriate microSD media and boot the device.
- Test the display, controls, and camera before moving meaningful Bitcoin.
- Run a small practice transaction and confirm the complete QR round trip.
Who is SeedSigner+ for?
- Bitcoiners who want transparent hardware: you assemble and inspect the device rather than trusting a sealed black box.
- Multisig users: SeedSigner was designed to reduce the cost and complexity of air-gapped multisignature signing.
- QR-first self-custody users: no cabled transaction data path is needed between the signer and wallet coordinator.
- Builders who want a premium enclosure: the upgraded screen, camera, controls, and metal case improve daily usability without abandoning the open-source model.
- Users who value stateless signing: seed material can be reconstructed for a session and cleared on shutdown rather than permanently stored on the device.
Back up the seed—not the signer
SeedSigner+ is intentionally stateless. If you lose the device, your seed backup is what preserves access to your Bitcoin. Store a verified backup offline and separate from the signer. For a durable stainless-steel option, pair it with the Seedor Safe Starter Set or the Seedor Safe Starter Set Plus.
SeedSigner+ specifications
| Product | SeedSigner+ Complete Air-Gapped Bitcoin Signing Device Kit |
|---|---|
| Price | $160.00 in every color |
| Colors | Black, Red, Orange, Gold |
| Display | 2.8-inch IPS display |
| Data transfer | Camera-scanned and display-presented QR codes |
| Network radios | None in the SeedSigner air-gapped architecture |
| Key storage | Stateless; seed material is not retained after shutdown |
| Software | Open-source SeedSigner software, obtained and verified by the user |
| Assembly | Required |
| Package sold here | Complete case and hardware kit only; no case-only or partial-kit options |
SeedSigner+ FAQ
What is SeedSigner+?
SeedSigner+ is an upgraded hardware package for the open-source SeedSigner Bitcoin signing model. It adds a larger 2.8-inch IPS display, improved QR camera, enhanced controls, and an anodized metal enclosure.
Is this a complete SeedSigner+ device kit?
Yes. CryptoCloaks sells only the complete case-and-hardware package on this listing. It includes the case, display/control PCB and hat, Pi, camera, and SD-extension hardware. Assembly is required.
Does every SeedSigner+ color cost $160?
Yes. Black, Red, Orange, and Gold are each $160. Color does not change the included hardware or price.
Can I buy only the metal case?
Not from this listing. CryptoCloaks sells the complete hardware kit only, preventing confusion between a finished-device kit and an empty enclosure.
Is SeedSigner+ air-gapped?
Yes. The SeedSigner security model uses a non-wireless signing device and exchanges transaction data through QR codes rather than networking the signer to your computer or phone.
Does SeedSigner+ store my seed phrase?
SeedSigner is stateless. Seed material is held for the active session and cleared from working memory when the device powers down. Your separate seed backup remains essential.
Does SeedSigner+ have WiFi or Bluetooth?
No. The SeedSigner architecture intentionally avoids WiFi and Bluetooth radios so transaction signing can remain physically separated from networked devices.
Is assembly required?
Yes. The complete kit arrives as components. Assembly lets you inspect the case, boards, camera, and connections before using the device.
Does the kit come with SeedSigner software installed?
Plan to obtain and verify the latest official SeedSigner release yourself. That is the safest way to know exactly which software image is running on your signing device.
How does SeedSigner+ sign Bitcoin transactions?
Your online wallet displays an unsigned transaction as animated QR codes. SeedSigner+ scans, displays, and signs the transaction offline, then shows signed QR codes for your online wallet to scan and broadcast.
Can SeedSigner+ be used for multisig?
Yes. Multisignature accessibility is a core SeedSigner use case, including XPUB exchange and transaction signing by QR code.
Which wallets work with SeedSigner+?
SeedSigner has supported wallet coordinators including Sparrow Wallet, Specter Desktop, Nunchuk, BlueWallet, Keeper, and Bull Bitcoin. Confirm current compatibility in official SeedSigner documentation before setup.
Can SeedSigner+ generate a new seed?
Yes. SeedSigner supports trust-minimized seed creation workflows including dice-roll entropy and image entropy, plus BIP39 and SeedQR tools.
What happens if the SeedSigner+ is lost or damaged?
The device is replaceable; your seed backup is not. Restore from a verified seed backup on another compatible signer. Never rely on the stateless device as your only backup.
Is SeedSigner+ an official endorsement from the SeedSigner project?
SeedSigner+ uses the open-source SeedSigner software and security model in an upgraded hardware form factor. This listing does not claim endorsement by or affiliation with the SeedSigner project.
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